ANGULAR DEPENDENT MAGNETORESISTANCE OSCILLATION IN STAGE-2 IBr GRAPHITE INTERCALATION COMPOUND

Document Type: Regular Paper

Authors

1 Department of Physics, Shiraz University, Shiraz, I. R. of Iran 71454

2 Department of Physics and Astronomy, McMaster University, Hamilton, ON, L8S 4M1, Canada

Abstract

The angular dependent magnetoresistance oscillation (ADMRO) of the stage-2 IBr graphite
intercalation compound (GIC) was studied between 1.8 K and 110 K in magnetic fields between 1 and 9
T. There was a series of peaks in the c-axis resistance as the field direction was changed from the c axis
to the (001) plane. The field independence of the angular positions of the peaks, showing that the
oscillation is not from the Shubnikov-de Haas effect, and the presence of the oscillation at high
temperatures indicate that the effect is semiclassic. The location and the relative amplitudes of the peaks
show that the ADMRO in this compound does not follow the predictions for the symmetrical corrugation
model of the cylindrical Fermi surface. The reason is attributed to the presence of two cylindrical Fermi
surfaces and zone folding of the Fermi surface by the periodicity of the IBr lattice in this compound.

Keywords